WO2018218889A1 - Système d'imagerie optique - Google Patents

Système d'imagerie optique Download PDF

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Publication number
WO2018218889A1
WO2018218889A1 PCT/CN2017/111842 CN2017111842W WO2018218889A1 WO 2018218889 A1 WO2018218889 A1 WO 2018218889A1 CN 2017111842 W CN2017111842 W CN 2017111842W WO 2018218889 A1 WO2018218889 A1 WO 2018218889A1
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Prior art keywords
lens
imaging system
optical imaging
optical
optical axis
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PCT/CN2017/111842
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English (en)
Chinese (zh)
Inventor
杨健
闻人建科
Original Assignee
浙江舜宇光学有限公司
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Publication date
Priority claimed from CN201710408244.7A external-priority patent/CN106990510B/zh
Priority claimed from CN201720633530.9U external-priority patent/CN207249227U/zh
Application filed by 浙江舜宇光学有限公司 filed Critical 浙江舜宇光学有限公司
Priority to US16/073,627 priority Critical patent/US11092783B2/en
Publication of WO2018218889A1 publication Critical patent/WO2018218889A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components

Definitions

  • the present application relates to an optical imaging system, and more particularly to a wide-angle imaging lens composed of seven lenses.
  • wide-angle lenses can be applied to more and more occasions, and because of their unique performance compared with general lenses, they are increasingly favored by various manufacturers.
  • the wide-angle lens has a short focal length and a long depth of field, which ensures that the front and back scenes of the subject can be clearly reproduced on the screen. This is very advantageous for photography; the wide-angle lens also has the characteristics of a large angle of view, under the same conditions, It can get more information, which is a very important application feature in security lens, car lens and other fields.
  • the general wide-angle lens is mostly made of all-glass structure, the total length is long, and the image quality is general. Due to the increasing development of portable electronic products, especially the 360-ring application which is getting bigger and bigger in the market, the miniaturization of the camera lens, Lightweight, ultra-wide-angle and image quality have put forward further higher requirements. In order to meet the requirements of miniaturization and weight reduction, it is necessary to further shorten the overall length of the lens and simultaneously incorporate plastic lenses. Shorten the total length of the system and increase the angle of view.
  • the use of aspherical surfaces can not only significantly improve the image quality, reduce aberrations, but also reduce the number of lenses and reduce the size of the lens.
  • the material of the aspherical lens is both glass and plastic.
  • the aspherical lens of the glass material is divided into two methods: grinding and die casting. The use of aspherical surfaces is of great help to the performance improvement of super wide-angle lenses.
  • the present invention aims to provide a seven-piece wide-angle lens that is aspherical and high in image quality and that uses an aspherical surface.
  • an optical imaging system including a first lens, a second lens, a third lens, a fourth lens, and a second in order from the object side to the image side along the optical axis A five lens, a sixth lens, and a seventh lens.
  • the first lens has a negative power, the image side is a concave surface; the fourth lens has a positive power; the fifth lens has a positive power or a negative power, the image side is a concave surface; and the seventh lens has a positive optical focus Degree or negative power, the image side is aspherical, at least one inflection point; the second lens, the third lens and the sixth lens respectively have positive or negative power; and the first lens side is effective
  • the radius DT11 is equal to half the ImgH of the diagonal length of the effective pixel area of the electronic imaging element of the optical imaging system: 0.5 ⁇ DT11 / ImgH ⁇ 1, for example, 0.71 ⁇ DT11 / ImgH ⁇ 0.87.
  • an optical imaging system including a first lens, a second lens, a third lens, and a fourth lens sequentially from the object side to the image side along the optical axis a fifth lens, a sixth lens, and a seventh lens.
  • the first lens has a negative power, the image side is a concave surface; the fourth lens has a positive power; the fifth lens has a positive power or a negative power, the image side is a concave surface; and the seventh lens has a positive optical focus Degree or negative power, the image side is aspherical, at least one inflection point; the second lens, the third lens and the sixth lens respectively have positive or negative power; and the first lens and the second lens
  • the separation distance T12 on the optical axis and the separation distance T67 of the sixth lens and the seventh lens on the optical axis may satisfy: 0.9 ⁇ T12 / T67 ⁇ 2.7, for example, 0.94 ⁇ T12 / T67 ⁇ 2.64.
  • the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens may satisfy: -1.7 ⁇ f1/f4 ⁇ -1.1, for example, -1.52 ⁇ f1/f4 ⁇ - 1.44.
  • the center thickness CT3 of the third lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis and the distance TTL of the first lens object side to the imaging surface of the optical imaging system on the optical axis Can satisfy: (CT3+CT6)/TTL ⁇ 0.15, for example, (CT3+CT6)/TTL ⁇ 0.13.
  • the distance between the first lens object side and the imaging surface of the optical imaging system on the optical axis, TTL, and the aperture value of the optical imaging system may be: TTL/Fno ⁇ 2.2 (mm), eg, TTL/ Fno ⁇ 2.1.
  • an optical imaging system electronic photosensor element between one half of the effective pixel area diagonal length ImgH and the optical imaging lens of the optical imaging system has an effective focal length f: ImgH/f>1, eg, ImgH/ f ⁇ 1.21.
  • the center thickness CT2 of the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis may satisfy: 0.9 ⁇ CT2/CT3 ⁇ 2.5, for example, 0.93 ⁇ CT2/CT3 ⁇ 2.42.
  • the sum of the center thickness of the first to seventh lenses on the optical axis ⁇ CT and the distance TTL of the first lens side to the imaging plane of the optical imaging system on the optical axis may satisfy: ⁇ CT /TTL ⁇ 0.6, for example, ⁇ CT/TTL ⁇ 0.5.
  • the radius of curvature R7 of the side surface of the fourth lens object and the radius of curvature R8 of the side surface of the fourth lens image may satisfy: -1.6 ⁇ R7/R8 ⁇ -0.5, for example, -1.57 ⁇ R7/R8 ⁇ - 0.61.
  • the effective radius DT11 of the side of the first lens object and the effective radius DT72 of the side of the seventh lens image may satisfy: 0.7 ⁇ DT11/DT72 ⁇ 1.3, for example, 0.87 ⁇ DT11/ DT72 ⁇ 1.16.
  • optical imaging system configured as described above, at least one advantageous effect of miniaturization, super wide angle, high image quality, high definition, low sensitivity, balance aberration, and the like can be further achieved.
  • FIG. 1 is a schematic structural view showing an optical imaging system according to Embodiment 1 of the present application.
  • FIG. 2A shows an axial chromatic aberration curve of the optical imaging system of Embodiment 1;
  • 2D shows a magnification chromatic aberration curve of the optical imaging system of Embodiment 1;
  • FIG. 3 is a schematic structural view showing an optical imaging system according to Embodiment 2 of the present application.
  • 4A shows an axial chromatic aberration curve of the optical imaging system of Embodiment 2;
  • 4D shows a magnification chromatic aberration curve of the optical imaging system of Embodiment 2;
  • FIG. 5 is a schematic structural view showing an optical imaging system according to Embodiment 3 of the present application.
  • 6A shows an axial chromatic aberration curve of the optical imaging system of Embodiment 3.
  • 6B shows an astigmatism curve of the optical imaging system of Embodiment 3.
  • 6C shows a distortion curve of the optical imaging system of Embodiment 3.
  • 6D shows a magnification chromatic aberration curve of the optical imaging system of Embodiment 3.
  • FIG. 7 is a schematic structural view showing an optical imaging system according to Embodiment 4 of the present application.
  • FIG. 9 is a schematic structural view showing an optical imaging system according to Embodiment 5 of the present application.
  • 10A shows an axial chromatic aberration curve of the optical imaging system of Embodiment 5;
  • Figure 10B shows an astigmatism curve of the optical imaging system of Example 5.
  • FIG. 10C shows a distortion curve of the optical imaging system of Embodiment 5.
  • FIG. 10D shows a magnification chromatic aberration curve of the optical imaging system of Embodiment 5.
  • the expressions of the first, second, etc. are used to distinguish one feature from another, and do not represent any limitation of the feature. Therefore, without back In the case of the teachings of the present application, the first lens discussed below may also be referred to as a second lens.
  • the thickness, size, and shape of the lens have been somewhat exaggerated for convenience of explanation.
  • the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the spherical or aspherical shape shown in the drawings.
  • the drawings are only examples and are not to scale.
  • the paraxial region refers to a region near the optical axis.
  • the first lens is the lens closest to the object and the seventh lens is the lens closest to the photosensitive element.
  • the surface closest to the object in each lens is referred to as the object side, and the surface of each lens closest to the image plane is referred to as the image side.
  • An optical imaging system has, for example, seven lenses, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are sequentially arranged from the object side to the image side along the optical axis.
  • the first lens may have a negative power and the image side is a concave surface; the fourth lens may have a positive power.
  • the fifth lens may have a positive power or a negative power, and the image side is concave.
  • the seventh lens may have a positive power or a negative power, and the image side is aspherical with at least one inflection point.
  • the second lens, the third lens, and the sixth lens may each have a positive power or a negative power.
  • an effective radius DT11 of the side of the first lens object and a half ImgH of the diagonal length of the effective pixel area of the electronic imaging element of the optical imaging system may satisfy: 0.5 ⁇ DT11/ImgH ⁇ 1, more specifically Further, 0.71 ⁇ DT11 / ImgH ⁇ 0.87 can be satisfied.
  • the imaging surface of the system meets the specifications, by reasonably selecting the effective radius of the side of the first lens, the incident angle of the light can be reasonably reduced, the sensitivity of the system is reduced, and the stability of the assembly is ensured.
  • the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens may satisfy: -1.7 ⁇ f1/f4 ⁇ -1.1, and more specifically, may further satisfy -1.52 ⁇ f1/f4 ⁇ -1.44.
  • Such a configuration is advantageous for ensuring miniaturization of the system, at the same time, improving the angle of view, achieving ultra-wide angle characteristics, effectively correcting various types of aberrations, improving image quality and definition, and reducing sensitivity.
  • the separation distance T12 of the first lens and the second lens on the optical axis and the separation distance T67 of the sixth lens and the seventh lens on the optical axis may satisfy: 0.9 ⁇ T12/T67 ⁇ 2.7 More specifically, 0.94 ⁇ T12 / T67 ⁇ 2.64 can be further satisfied.
  • T12 and T67 it is possible to make the distribution of the center thickness of each lens uniform under the premise of ensuring the image quality, which is beneficial to the production and assembly of the system lens.
  • the center thickness CT3 of the third lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis and the distance TTL of the first lens object side to the imaging plane of the optical imaging system on the optical axis TTL It can be satisfied that: (CT3+CT6)/TTL ⁇ 0.15, more specifically, (CT3+CT6)/TTL ⁇ 0.13 can be further satisfied.
  • a distance TTL between the side of the first lens object to the imaging surface of the optical imaging system on the optical axis and the aperture value of the optical imaging system may satisfy: TTL/Fno ⁇ 2.2 (mm), more specifically Can further meet TTL / Fno ⁇ 2.1.
  • an optical imaging system electronic light sensing element between one half of the effective pixel area diagonal length ImgH and the optical imaging lens of the optical imaging system can satisfy: ImgH/f>1, more specifically , can further satisfy ImgH / f ⁇ 1.21.
  • the angle of view of the system lens can be increased to ensure the large angle of view of the system lens.
  • the center thickness CT2 of the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis may satisfy: 0.9 ⁇ CT2/CT3 ⁇ 2.5, and more specifically, may further satisfy 0.93 ⁇ CT2 / CT3 ⁇ 2.42.
  • the sum of the center thicknesses of the first to seventh lenses on the optical axis ⁇ CT and the distance TTL of the first lens object side to the imaging surface of the optical imaging system on the optical axis may satisfy: CT/TTL ⁇ 0.6, more specifically, can further satisfy ⁇ CT/TTL ⁇ 0.5.
  • the radius of curvature R7 of the side surface of the fourth lens object and the radius of curvature R8 of the side surface of the fourth lens image may satisfy: -1.6 ⁇ R7/R8 ⁇ -0.5, and more specifically, may further satisfy -1.57 ⁇ R7 / R8 ⁇ -0.61.
  • the effective radius DT11 of the first lens object side and the effective radius DT72 of the seventh lens image side may satisfy: 0.7 ⁇ DT11/DT72 ⁇ 1.3, and more specifically, may further satisfy 0.87 ⁇ DT11/ DT72 ⁇ 1.16.
  • DT11 and DT72 can effectively correct the off-axis aberration of the system and meet the ultra wide-angle characteristics under the condition of assembly.
  • the optical imaging system may also be provided with an aperture STO for limiting the beam, adjusting the amount of incoming light, and improving imaging quality.
  • An optical imaging system in accordance with the above-described embodiments of the present application can employ multiple lenses, such as the seven described above. By properly distributing the power of each lens, the surface shape, the center thickness of each lens, and the on-axis spacing between the lenses, the aperture of the optical imaging system can be effectively expanded, the system sensitivity can be reduced, and the lens can be miniaturized and improved.
  • the imaging quality makes the optical imaging system more advantageous for production processing and can be applied to portable electronic products.
  • at least one of the mirror faces of each lens is an aspherical mirror.
  • Aspherical lenses are characterized by a continuous change in curvature from the center of the lens to the periphery. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery, the aspherical lens has better curvature radius characteristics, has the advantages of improving distortion and improving astigmatic aberration, and can make the field of view larger and more realistic. With an aspherical lens, the aberrations that occur during imaging can be eliminated as much as possible, improving image quality. In addition, the use of aspherical lenses can also effectively reduce the number of lenses in an optical system.
  • optical imaging system is not limited to including seven lenses.
  • the optical imaging system can also include other numbers of lenses if desired.
  • FIG. 1 is a block diagram showing the structure of an optical imaging system according to Embodiment 1 of the present application. As shown in FIG. 1, the optical imaging system includes seven lenses L1-L7 sequentially arranged from the object side to the imaging side along the optical axis.
  • the first lens L1 has an object side surface S1 and an image side surface S2; the second lens L2 has an object side surface S3 and an image side surface S4; and the third lens L3 has an object side surface S5 and an image side surface S6; the fourth lens L4 has an object side surface S7 and an image side surface S8; the fifth lens L5 has an object side surface S9 and an image side surface S10; the sixth lens L6 has an object side surface S11 and an image side surface S12, and the seventh lens L7 has an object side surface S13 and Like side S14.
  • the first lens may have a negative power, the image side is a concave surface; the fourth lens may have a positive power; the fifth lens may have a positive power or a negative power, and the image side is a concave surface
  • the seventh lens may have a positive power or a negative power, and the image side is aspherical with at least one inflection point.
  • the second lens, the third lens, and the sixth lens may each have a positive power or a negative power.
  • an aperture STO for limiting the light beam is further included.
  • the optical imaging system according to Embodiment 1 may include a filter L8 having an object side S15 and an image side S16, and the filter L8 may be used to correct color deviation. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
  • Table 1 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens of the optical imaging system of Example 1.
  • each lens is used as an example.
  • the aperture of the lens is effectively enlarged, the total length of the lens is shortened, the large aperture and miniaturization of the lens are ensured, and various aberrations are corrected at the same time.
  • the resolution and image quality of the lens is defined by the following formula:
  • x is the distance of the aspherical surface at height h from the optical axis, and the distance from the aspherical vertex is high;
  • k is the conic coefficient (given in Table 1 above);
  • Ai is the correction coefficient of the a-th order of the aspheric surface.
  • Table 2 shows the high order term coefficients A 4 , A 6 , A 8 , A 10 and A 12 which can be used for each of the mirror faces S1 - S14 in Embodiment 1.
  • Table 3 shown below gives the effective focal lengths f1 to f7 of each lens of Example 1, and light.
  • 2A shows an axial chromatic aberration curve of the optical imaging system of Embodiment 1, which indicates that the light of different wavelengths is deflected by the focus point after passing through the optical imaging system.
  • 2B shows an astigmatism curve of the optical imaging system of Embodiment 1, which shows a meridional field curvature and a sagittal image. The surface is curved.
  • 2C shows a distortion curve of the optical imaging system of Embodiment 1, which represents distortion magnitude values in the case of different viewing angles.
  • 2D shows a magnification chromatic aberration curve of the optical imaging system of Embodiment 1, which shows the deviation of different image heights on the imaging plane after the light passes through the optical imaging system.
  • the optical imaging system given in Embodiment 1 can achieve good imaging quality.
  • Embodiment 2 of the present application is described below with reference to FIGS. 3 through 4D.
  • the optical imaging system described in the respective embodiments is the same as the optical imaging system described in Embodiment 1.
  • a description similar to that of Embodiment 1 will be omitted.
  • FIG. 3 is a block diagram showing the structure of an optical imaging system according to Embodiment 2 of the present application.
  • the optical imaging system according to Embodiment 2 includes first to seventh lenses L1 to L7 having an object side and an image side, respectively.
  • Table 4 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens of the optical imaging system of Example 2.
  • Table 5 shows the high order term coefficients of the respective aspherical mirrors in Example 2.
  • Table 6 shows the effective focal lengths f1 to f7 of the lenses of Embodiment 2, the effective focal length f of the imaging lens of the optical imaging system, the object side S1 of the first lens L1, and the imaging surface S17 of the optical imaging system on the optical axis.
  • the distance TTL the electronic photosensitive element of the optical imaging system, the effective pixel area diagonal half of the ImgH and the optical imaging system aperture value Fno.
  • each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.
  • 4A shows an axial chromatic aberration curve of the optical imaging system of Embodiment 2, which shows that the light of different wavelengths deviates from the focus point after passing through the optical imaging system.
  • 4B shows an astigmatism curve of the optical imaging system of Embodiment 2, which shows meridional field curvature and sagittal image plane curvature.
  • 4C shows a distortion curve of the optical imaging system of Embodiment 2, which represents the distortion magnitude value in the case of different viewing angles.
  • 4D shows the optical imaging system of Embodiment 2.
  • a chromatic aberration curve that indicates the deviation of different image heights on the imaging surface after the light passes through the optical imaging system. 4A to 4D, the optical imaging system given in Embodiment 2 can achieve good imaging quality.
  • FIG. 5 is a block diagram showing the structure of an optical imaging system according to Embodiment 3 of the present application.
  • the optical imaging system according to Embodiment 3 includes first to seventh lenses L1 to L7 having an object side and an image side, respectively.
  • Table 7 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens of the optical imaging system of Example 3.
  • Table 8 shows the high order term coefficients of the respective aspherical mirrors in the third embodiment.
  • Table 9 shows the effective focal lengths f1 to f7 of the lenses of Embodiment 3, the effective focal length f of the imaging lens of the optical imaging system, the object side S1 of the first lens L1, and the imaging surface S17 of the optical imaging system on the optical axis.
  • each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.
  • 6A shows an axial chromatic aberration curve of the optical imaging system of Embodiment 3, which shows that the light of different wavelengths deviates from the focus point after passing through the optical imaging system.
  • Fig. 6B shows an astigmatism curve of the optical imaging system of Embodiment 3, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 6C shows a distortion curve of the optical imaging system of Embodiment 3, which shows distortion magnitude values in the case of different viewing angles.
  • 6D shows a magnification chromatic aberration curve of the optical imaging system of Embodiment 3, which shows the deviation of different image heights on the imaging plane after the light passes through the optical imaging system.
  • the optical imaging system given in Embodiment 3 can achieve good imaging quality.
  • FIG. 7 is a block diagram showing the structure of an optical imaging system according to Embodiment 4 of the present application.
  • the optical imaging system according to Embodiment 4 includes first to seventh lenses L1 - L7 having object side and image side, respectively.
  • Table 10 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens of the optical imaging system of Example 4.
  • Table 11 shows the high order term coefficients of the respective aspherical mirrors in Example 4.
  • Table 12 shows the effective focal lengths f1 to f7 of the lenses of Embodiment 4, the effective focal length f of the imaging lens of the optical imaging system, the object side S1 of the first lens L1, and the imaging surface S17 of the optical imaging system on the optical axis.
  • each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.
  • Figure 8A shows an axial chromatic aberration curve for the optical imaging system of Example 4, which shows that the different wavelengths of light are deflected by the focus point after passing through the optical imaging system.
  • Fig. 8B shows an astigmatism curve of the optical imaging system of Embodiment 4, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 8C shows a distortion curve of the optical imaging system of Embodiment 4, which shows distortion magnitude values in the case of different viewing angles.
  • Fig. 8D shows a magnification chromatic aberration curve of the optical imaging system of Embodiment 4, which shows the deviation of different image heights on the imaging plane after the light passes through the optical imaging system. 8A to 8D, the optical imaging system given in Embodiment 4 can achieve good imaging quality.
  • FIG. 9 is a block diagram showing the structure of an optical imaging system according to Embodiment 5 of the present application.
  • the optical imaging system according to Embodiment 5 includes first to seventh lenses L1 to L7 having object side and image side, respectively.
  • Table 13 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens of the optical imaging system of Example 5.
  • Table 14 shows the high order term coefficients of the respective aspherical mirrors in Example 5.
  • Table 15 shows each of the examples 5
  • the half of the diagonal of the effective pixel area of the component is ImgH and the aperture value Fno of the optical imaging system.
  • each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.
  • Figure 10A shows an axial chromatic aberration curve for the optical imaging system of Example 5, which shows that the different wavelengths of light are deflected by the focus point after passing through the optical imaging system.
  • Fig. 10B shows an astigmatism curve of the optical imaging system of Embodiment 5, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 10C shows a distortion curve of the optical imaging system of Embodiment 5, which shows distortion magnitude values in the case of different viewing angles.
  • Fig. 10D shows a magnification chromatic aberration curve of the optical imaging system of Embodiment 5, which shows the deviation of different image heights on the imaging plane after the light passes through the optical imaging system.
  • the optical imaging system given in Embodiment 5 can achieve good imaging quality.
  • Embodiments 1 to 5 respectively satisfy the relationships shown in Table 16 below.

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Abstract

Cette invention concerne un système d'imagerie optique, comprenant : en séquence d'un côté objet à un côté image le long de l'axe optique, une première lentille (L1), une deuxième lentille (L2), une troisième lentille (L3), une quatrième lentille (L4), une cinquième lentille (L5), une sixième lentille (L6) et une septième lentille (L7). La première lentille présente une puissance négative, et le côté image de la première lentille est une surface concave ; la quatrième lentille présente une puissance positive ; la cinquième lentille présente une puissance positive ou une puissance négative, et le côté image de la cinquième lentille est une surface concave ; la septième lentille présente une puissance positive ou une puissance négative, et le côté image de la septième lentille est asphérique et a au moins un point d'inflexion ; la deuxième lentille, la troisième lentille et la sixième lentille présentent respectivement une puissance positive ou négative ; et le rayon effectif (DT11) du côté objet de la première lentille et une moitié de la longueur diagonale ImgH d'une zone de pixel efficace d'un photo-capteur électrique du système d'imagerie optique satisfont à : 0,5 < DT11/ImgH < 1.
PCT/CN2017/111842 2017-06-02 2017-11-20 Système d'imagerie optique WO2018218889A1 (fr)

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CN201710408244.7A CN106990510B (zh) 2017-06-02 2017-06-02 光学成像系统
CN201720633530.9 2017-06-02
CN201720633530.9U CN207249227U (zh) 2017-06-02 2017-06-02 光学成像系统
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TWI665488B (zh) * 2018-12-26 2019-07-11 大立光電股份有限公司 攝影光學系統、取像裝置及電子裝置
TWI707157B (zh) * 2019-06-18 2020-10-11 大立光電股份有限公司 攝影透鏡系統、取像裝置及電子裝置
CN112596210A (zh) * 2020-12-23 2021-04-02 江西晶超光学有限公司 光学系统、摄像模组及电子设备
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